---------------------------------------------------------------------------- Contaminant Type of Contaminant Health Effects ---------------------------------------------------------------------------- Alachlor Herbicides/Organic Cancer; nervous system damage Asbestos Inorganic Cancer Atrazine Herbicides/Organic Cancer; nervous system and mammary glands damage Benzene VOC Cancer, leukemia, and anemia Bromodichloromethane (TTHM) VOC/THM Nervous system, muscle damage; cancer Bromoform (TTHM) VOC/THM Nervous system, muscle damage; cancer Carbofuran (Furadan) Pesticides/Organic Nervous system, kidney, reproductive system, and liver damage; anemia, leukemia Carbon Tetrachloride VOC Cancer Chlorobenzene VOC Nervous system, kidney, (Monochlorobenzene) liver damage Chloroform (TTHM) VOC/THM Nervous system and muscle damage; cancer Cryptosporidium Human & animal Gastroenteric diseases fecal waste Cysts (Giardia, Protozoan, Human & animal Gastroenteric diseases Cryptosporidium) fecal waste 2,4-D Pesticides/Organic Liver and kidney damage DBCP (Dibromochloropropane) Fumigant Reproductive system damage; cancer Dibromochloromethane (TTHM) VOC/THM Nervous system and muscle damage, cancer o-Dichlorobenzene VOC Kidney, liver, and lung (1,2-Dichlorobenzene) damage p-Dichlorobenzene VOC Cancer (para-Dichlorobenzene) l,l-Dichloroethane (1,1-DCA) VOC Liver, kidney, and nervous system damage 1,2-Dichloroethane (1,2-DCA) VOC Cancer trans-1,2-Dichloroethane VOC Pending study 1,1-Dichloroethylene VOC Cancer, kidney, and (1,1-DCE) liver damage cis 1,2-Dichloroethylene VOC Liver, kidneys, nervous & circulatory system damage 1,2-Dichloropropane VOC Cancer, kidneys, and (Propylene Dichloride) liver damage cis-1,3-Dichloropropane Pesticides Bladder and kidney damage Dinoseb Pesticides/Organic Thyroid, reproductive organ damage EDB (Ethyl Dibromide) Pesticides Reproductive and other organ damage Endrin Pesticides/Organic Nervous system, kidney, liver damage; anemia, cancer, heart damage Ethylbenzene Organic Nervous system, liver, and kidney damage Giardia Human & animal Gastroenteric diseases fecal waste Heptachlor Pesticides/Organic Cancer Heptachlor Epoxide Pesticides/Organic Cancer Hexachlorobutadiene VOC Pending study (Perchlorobutadiene) Hexachlorocyclopentadiene VOC Kidney and stomach damage Lead (pH 6.5 and pH 8.5) Heavy Metal Nervous system and kidney damage; highly toxic to infants & pregnant women Lindane Pesticides/Organic Nervous system, liver, kidney damage Mercury (pH 6.5 and pH 8.5) Heavy Metal Nervous system and kidney damage; highly toxic to infants & pregnant women Methyl Tertiary Butyl Ether VOC Suspected chemical (MTBE) carcinogen Methoxychlor Pesticides/Organic Nervous system, kidney, liver damage; anemia, cancer Pentachlorophenol Herbicides/Organic Liver and kidney damage; cancer Simazine Herbicides/Organic Nervous system damage; cancer Styrene VOC Nervous system, kidney, and liver damage l,1,2,2-Tetrachloroethane VOC Pending study Tetrachloroethylene VOC Nervous system damage; cancer Toluene (Methylbenzene) VOC Nervous system, liver, and kidney damage 2,4,5-TP (Silvex) Pesticides Nervous system, liver, and kidney damage; cancer 1,2,4-Trichlorobenzene Pesticides Liver and kidney damage 1,1,1-Trichloroethane VOC Nervous system and liver (1,1,1-TCA) damage 1,1,2-Trichloroethane Pesticides Kidney, liver, & Nervous system damage Trichloroethylene (TCE) VOC Cancer Trihalomethanes VOC, Disinfection Cancer; nervous system & by-product muscle damage (TTHM; Chloroform; Bromoform; Bromodichloromethane; Dibromochloromethane) Turbidity Coliform, Interferes with dis- surface water infection, related to dis- treatment infection by-products meta-Xylene Pesticides Nervous system, liver, kidneys, lungs, & mucous membranes o-Xylene (Ortho-Xylene) Pesticides Nervous system, liver, kidneys, lungs, & mucous membranes para-Xylene Pesticides Nervous system, liver, kidneys, lungs, & mucous membranes VOC = Volatile Organic Chemicals